In which py.test callout can I find both 'item' and 'report' data?

问题

pytest_runtest_makereport() gets two arguments, item and call. From item, I can find the funcarg I created for this test, and from call, I can find the exception info (if any):

def pytest_runtest_makereport (item, call):
    my_funcarg = item.funcargs['name']
    my_funcarg.excinfo = call.excinfo

Unfortunately, excinfo is populated for both failures and for skips. To distinguish, I need to look at the report argument to pytest_report_teststatus():

def pytest_report_teststatus (report):
    if report.when == 'call':
        if report.failed:
            failed = True
        elif report.skipped:
            skipped = True
        else:
            passed = True

That's great info, but I can't correlate it to the funcarg I created for the test. I have looked at the report argument (a TestReport report), and I can't find any way to get back to the item passed to pytest_runtest_makereport(), or the funcarg I created.

Where can I get access to both?

回答1:

There is a little undocumented somewhat unofficial method with which hook implementations can interact with other hook implementations, for example to post-process their result. In your concrete case you might do something like:

@pytest.mark.tryfirst
def pytest_runtest_makereport(item, call, __multicall__):
    rep = __multicall__.execute()
    # your code follows and you can use rep.passed etc.
    return rep

Notes:

a hook call will usually call multiple hook implementations
the "tryfirst" marker instructs the hook call to have your implementation be invoked early
the multicall parameter represents the ongoing hook call and can be used to call the remaining hook implementations and then
use their result for further processing
you need to return "rep" here because you shadow the "real" creation

The multicall API is very seldomly really and i suspect there could be solutions for your use case that don't require it.

HTH, Holger

回答2:

While hpk42's answer works, __multicall__ is being depreciated.

This achieves the same result though:

@pytest.hookimpl(hookwrapper=True)
def pytest_runtest_makereport(item, call):
    outcome = yield
    rep = outcome.get_result()
    setattr(item, "rep_" + rep.when, rep)
    return rep

来源：https://stackoverflow.com/questions/10754970/in-which-py-test-callout-can-i-find-both-item-and-report-data

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python

pytest